Meta-phenylenediamine coupler compounds and oxidative hair...

Details Meta-phenylenediamine coupler compounds and oxidative hair... Meta-phenylenediamine coupler compounds and oxidative hair...

C - Chemistry, Metallurgy

07

C

167/302, 260/597

C07C 205/12 (2006.01) C07C 205/37 (2006.01) C07C 205/38 (2006.01)

Patent

CA 1223278

META-PHENYLENEDIAMINE COUPLER COMPOUNDS AND OXIDATIVE HAIR DYE COMPOSITIONS AND METHODS USING SAME ABSTRACT OF THE DISCLOSURE 2-Equivalent oxidative hair dye coupler compounds of the formula (I) Image wherein X is halogen or OR', wherein R and R' may be the same or different and represent alkyl, mono- or poly-hydroxyalkyl, alkoxyalkyl, alkylphenyl, aminoalkyl, mono- and di-alkylamino- alkyl, phenyl or phenylalkyl except that R and R' are not both methyl, and the acid addition salts thereof are used in oxidative hair dye compositions with conventional para bases. The amount of oxidizing agent can be reduced relative to similar compositions containing 4-equivalent meta couples compounds. Some of the compounds of formula (I) in which X is OR' are novel compounds as is the elimination of HOR' during the oxidative coupling reaction.

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